Sony ICD-35 / ICD-55 Service Manual ▷ View online
– 5 –
MAIN BOARD
INSTALLATION “MAIN BOARD”, “MICROPHONE, ELECTRIC CONDENSER” (MIC101)
1
two screws
(M1.7
(M1.7
×
4)
2
bracket
(jack)
(jack)
3
Remove the MAIN board to
direction of the arrow.
direction of the arrow.
knob (MODE)
knob (HOLD)
S711
S712
microphone, electric condenser
(MIC101)
(MIC101)
On installation MAIN board adjust the S711, S712
and knob (HOLD, MODE).
and knob (HOLD, MODE).
two leads
microphone,
electric condenser
(MIC101)
electric condenser
(MIC101)
Install two leads the electric condenser microphone
(MIC101) in the figure.
(MIC101) in the figure.
ICD-55
– 7 –
– 8 –
SECTION 4
DIAGRAMS
4-1.
BLOCK DIAGRAM
ADPCM
IC101 (1/2)
MIC
MIC101
ADPCM
IC101 (2/2)
05
•
SIGNAL PATH
: PLAY
: REC
J101
SP101
(SPEAKER)
TONE CONTROL
SWITCH
Q150
3.3V
(ADPCM (IC101) B+)
3.5V
(LED B+)
1.5V
(POWER AMP (IC102) B+)
XSPOWER
XHOLD
TP701
(TEST)
S701 – S705
S706 – S710
D504
D503
(LCD BACK LIGHT)
GRN
OPR
(PLAY)
(REC)
RED
IC706
REAL TIME CLOCK
IC703
X701
32.768kHz
OSCIN
OSCOUT
32KOUT
DSPIS
DSPIR
IR
VFRO
IS
MIC AMP
IC103 (1/2)
MIC SENSE
SWITCH
Q103
AGC CIRCUIT
D101, 102,
Q104
DIVIDER
IC104
LINE MUTING
Q105
POWER AMP
IC102, Q108, 109
EAR
GATE SWITCH
IC705
BUFFER
IC103 (2/2)
L.P.F.
A/D
CONVERTER
DECIMATION
FILTER
L.P.F.
L.P.F.
D/A
CONVERTER
RV101
VOL
INTER-
POLATOR
B.P.F.
COMPRESSOR
EXPANDER
ADPCM
ENCODER
ADPCM
DECODER
AIN2
PCMSO
PCMSI
LEDPB
LEDREC
69
XRESET 84
AMPPO 68
4
67
66
8
1
9
X702
5MHz
X2
X1
80
MSKCLK
18
XBCK
74
SYNCOUT
15
SYNCIN
85
SYNCMSK
16
MICSEL
6
79
MCK
RSYNC
22
29
XSYNC
BCLK
30
31
DIN
EXCK
19 20
DEN
21
14
26
25
8
72
XPDRST
71
XDSPDEN
65
RTCDO
76
RTCCLK
77
RTCDI
75
RTCCE
70
RTCINT
SI
SCLK
SO
CE
INTR
87
XT1
82
4
2
3
7
6
73
LMUTE
5
LPMODE 89
BEEP 21
28
27
PCMRO
PCMRI
24
23
6
FLASH MEMORY
IC702
FMIO0 – FMIO7
S0 – S29
I/O0 – I/O7
14
2
11
3
10
4
17
42
20
XFMSE
40
19
5
7
43
WE
RE
WP
CE
13
41
R/B
XFMCE
XFMWP
XFMRE
XFMWE
91 – 98
18 – 21, 24 – 27
32 – 61
COM0 – COM3
23 – 26
XFMBSY
LED DRIVE
Q506 (1/2)
LED DRIVE
Q506 (2/2)
WAKE UP CONTROL
SWITCH
Q701 – 703
LIGHT 22
KEY0
1
LED DRIVE
Q505
KEY1
2
W
AKEUP
86
TEST
64
ND701
LIQUID CRYSTAL
DISPLAY
OFF
HOLD
S711
C
HOLD
SPDSW
3
FAST
NORMAL
SLOW
S712
PLAY SPEED
DRY BATTERY
SIZE “AAA”
(IEC DESIGNATION R03)
1P. 1.5V
VOLTAGE
DETECT
IC504
POWER
SWITCHING
Q508
OSC
Q502
DC/DC
CONVERTER
IC502
+3.3V
REGULATOR
IC503
B+ SWITCH
Q106, 107
BATT
BATT B+
BATT B+
100
DC/DC
CONVERTER
IC501
DC/DC CONVERTER
CONTROL
Q507
RESET SIGNAL
GENERATOR
IC505
3.3V
SYSTEM CONTROLLER (IC701), FLASH
MEMORY (IC702), REAL TIME CLOCK (IC703) B+
+
SYSTEM CONTROLLER
IC701
CLE
ALE
SE
XFMCLE
XFMALE
PDN
– 9 –
– 10 –
ICD-55
4-2.
PRINTED WIRING BOARD
• Semiconductor
Location
Ref. No.
Location
D101
B-9
D102
B-8
D501
E-2
D502
E-3
D503
A-8
D504
C-4
D701
E-4
IC101
B-3
IC102
F-3
IC103
C-9
IC104
B-4
IC501
E-2
IC502
E-2
IC503
D-2
IC504
D-3
IC505
F-3
IC701
D-8
IC702
F-8
IC703
E-4
IC705
E-9
IC706
D-9
Q103
B-3
Q104
B-8
Q105
B-4
Q106
F-2
Q107
F-9
Q108
F-3
Q109
G-3
Q150
F-2
Q502
D-2
Q505
B-3
Q506
D-4
Q507
D-3
Q508
E-8
Q701
F-2
Q702
F-2
Q703
F-2
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
®
: Through hole.
•
¢
: internal component.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
•
This board is multi-layer printed board.
However, the patterns of intermediate-layer have not been in-
cluded in the diagram.
However, the patterns of intermediate-layer have not been in-
cluded in the diagram.
ICD-55
– 11 –
– 12 –
– 13 –
4-3.
SCHEMATIC DIAGRAM
•
See page 14 for Waveforms.
•
See page 15 for IC Block Diagrams.
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
¢
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 1.5V and fed with regulated dc power
supply from battery terminal.
no mark : PLAY
(
no mark : PLAY
(
) : REC
<
> : STOP
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: PLAY
L
: REC
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